University of Texas Shooting

AP Photo/The Daily Texan, Caleb Bryant Miller

A police helicopter circles the University of Texas campus in Austin on Tuesday, Sept. 28, 2010, after a shooting. A gunman opened fire Tuesday inside the campus library then fatally shot himself.

Police prepare to enter Calhoun Hall at the University of Texas at Austin campus in Austin, Texas, on Tuesday, Sept. 28, 2010.

Police officers stand at the intersection of University Avenue and 21st Street on the University of Texas at Austin campus after reports of a shooting at the Perry-Castaneda Library on Tuesday, Sept. 28, 2010.

From inside Jester dormitory, freshman Trevor Egan looks out at the line of police in front of the Perry-Castaneda Library, reflected in window, on the University of Texas at Austin campus in Austin, Texas, on Tuesday, Sept. 28, 2010.

Austin Police Department officers stand at the intersection of 21st and Speedway, in front of the Perry-Castaneda Library, where shots were fired Tuesday morning, Sept. 28, 2010. Police say a gunman opened fire inside the library, then shot and killed himself.

Police officer patrols the University of Texas campus in Austin early Tuesday morning Sept. 28, 2010, after a gunman opened fire at the Perry-Castaneda Library.

Undergraduate studies student Donetta Dean-Gibbs watches police enter nearby buildings outside Parlin Hall on the University of Texas campus on Sept. 28, 2010. Police searched for a suspected second gunman after first shooter committed suicide in the Perry-Castaneda Library Tuesday morning.

Students Paige Raiczyk, front left, and Veronica Rivera, front right, and other University of Texas students and faculty hold their phones for updated text messages inside Benedict Hall on campus in Austin early Tuesday morning, Sept. 28, 2010, after a shooting on campus.